As part of an investigation into a homicide, a white crystalline substance was found in a safe. The substance was submitted to the laboratory as a drug sample. Subsequent analysis proved the material to be triacetonetriperoxide (TATP), which is highly explosive. The results of analyses utilizing mass spectrometry, infrared (IR) and ultraviolet (UV) spectrophotometry, energy-dispersive X-ray spectrometry (EDXA), and gas chromatography are given, along with the circumstances leading to the discovery that the material was explosive.